64683765 has 40 divisors (see below), whose sum is σ = 117960480. Its totient is φ = 33900768.

The previous prime is 64683727. The next prime is 64683781. The reversal of 64683765 is 56738646.

It is not a de Polignac number, because 64683765 - 2⁷ = 64683637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64683765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 22542 + ... + 25248.

It is an arithmetic number, because the mean of its divisors is an integer number (2949012).

Almost surely, 2^64683765 is an apocalyptic number.

It is an amenable number.

64683765 is a deficient number, since it is larger than the sum of its proper divisors (53276715).

64683765 is a wasteful number, since it uses less digits than its factorization.

64683765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2783 (or 2774 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 64683765 is about 8042.6217740237. The cubic root of 64683765 is about 401.4194672401.

The spelling of 64683765 in words is "sixty-four million, six hundred eighty-three thousand, seven hundred sixty-five".